/*
 * SonarQube Java
 * Copyright (C) 2012-2020 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.java.checks;

import org.sonar.check.Rule;
import org.sonar.plugins.java.api.semantic.Type;
import org.sonar.plugins.java.api.tree.BinaryExpressionTree;

@Rule(key = "S4973")
public class CompareStringsBoxedTypesWithEqualsCheck extends CompareWithEqualsVisitor {

  @Override
  protected void checkEqualityExpression(BinaryExpressionTree tree) {
    Type leftOpType = tree.leftOperand().symbolType();
    Type rightOpType = tree.rightOperand().symbolType();
    if (!isNullComparison(leftOpType, rightOpType)
      && (isStringType(leftOpType, rightOpType) || isBoxedType(leftOpType, rightOpType))) {
      reportIssue(tree.operatorToken());
    }
  }

}
